After using using D700's for a few years, I tried a 5Dmkii for a week with two lenses, a 35mmL and 135L. One week later, I bought the Nikon 35mm f1.4 G for my D700 which has become my most used lens while the 70-200mm VRii is still my favorite.

Comparing the two camera bodies, I find the D700 ergonomics/controls are easier than the 5Dmkii. IQ: I see less noise in shadow areas with the Nikon.